Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
supreme-edu.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 17:39:55 UTC · ↺ Refresh
MX Hostnames
- mx1.dialhost.com.br
- mx2.dialhost.com.br
- mx.dialhost.com.br
MX Priorities
- mx.dialhost.com.br: 5
- mx1.dialhost.com.br: 10
- mx2.dialhost.com.br: 20
A / AAAA Records
- 177.52.160.63 ↩ 177-52-160-63
- 2804:b44:1000::38 (no PTR)
Mail Server IPs
- 138.118.172.245 ↩ br110.dialhost.com.br
- 138.118.172.241 ↩ br121.dialhost.com.br
SOA Record
Raw SOA
ns1.dialhost.com.br alerta.dialhost.com.br 2025020305 3600 600 2219200 3600
Primary NS (mname)
ns1.dialhost.com.br
Admin Email (rname)
alerta@dialhost.com.br
Serial
2025020305
Refresh
3600s
Retry
600s
Expire
2219200s
Minimum TTL
3600s
Nameservers (NS)
ns4.dialhost.com.br
ns2.dialhost.com.br
ns3.dialhost.com.br
ns1.dialhost.com.br
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.dialhost.com.br -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 include:_spf.dialhost.com.br -all
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